No matter how big your number is (but don't enter a big number, it will take a looooooooooong time), this calculator can find the primes to that number! For example, let's say we want to list all of the prime numbers of a number called 'n.' The computer lists all of the primes numbers that are below n. Don't believe me? Calculate it with another calculator that you know is correct and check your answers!
My dad for teaching me how to get started, and huyckkid14.